S-97345A253 1/4"-20 ASME B18.3 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments.
- High-strength performance offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
- Precise alignment and spacing ensured by the 3/8" diameter shoulder with tight tolerances, reducing component wear.
- Easy installation and removal with a hex socket drive and knurled head for improved grip and torque application.
- Secure, vibration-resistant fit from Class 3A UNC coarse threads, maintaining integrity under dynamic loads.
- Long-term durability backed by Rockwell B79 hardness, resisting deformation and extending service life.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical stress. The 1/4"-20 UNC coarse thread with Class 3A fit provides a secure, vibration-resistant connection, while the precisely machined 3/8" shoulder acts as a reliable pivot or spacer in assemblies like rotating shafts, bearings, and linkages. Made from corrosion-resistant 316 stainless steel, it excels in harsh environments, including chemical processing and marine applications, where durability is critical. The hex socket drive and knurled head facilitate easy installation in tight spaces, reducing assembly time and improving operational efficiency in machinery, automation systems, and precision equipment.
Specification Summary & Compliance
This shoulder screw features a 1/4"-20 UNC thread with Class 3A fit for high precision, a shoulder diameter of 3/8" with tolerance of -0.004" to -0.002", and a shoulder length of 3" with tolerance of -0.005" to 0.005". It complies with ASME B18.3 specifications and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring it meets stringent environmental and safety standards for industrial use.
